A reflected ghost!  Note the whitish figure at far left, standing head-and-shoulders above the woman its next to.  It has a large head, seems to be smiling, and perhaps wears sunglasses.  It has a hand over the face of the woman.  Then note how the ghost is not visible amongst the figures below.  From George Fox University's 1971 yearbook.

"For years I suffered in silence!"  From Movie Classic, 1936.

From the University of Mary Washington's 1926 yearbook.

"Exchanging crap for more crap."  From Woroni, 1998.

From the University of North Carolina at Chapel Hill's 1917 yearbook.

From Unknown, 1941.  See Of Drinking in Remembrance of the Dead.

From King Longbeard, Or Annals of the Golden Dreamland by Barrington MacGregor and illustrated by Charles Robinson, 1897.

From Textile Fabrics by Elizabeth Dyer, 1927.

"Santa Fe Pegasus."  From Laughing Horse, 1924.

"Haggis is not enough."  From The Children's Newspaper, 1946.

From St. Nicholas, 1889. 

From Travel By Air, Land, and Sea by Hanson Hart Webster, 1933.

From Ozma of Oz by L. Frank Baum and illustrated by John R. Neill, 1907.

We can answer the third question about who killed us and with what, when, and where: it was Miss Scarlet, in the library just now, with the candlestick.  From The Aberree, 1954.  

From Indiana State Normal School's 1919 yearbook.

From Emblemland by John Kendrick Bangs and Charles Raymond Macauley, 1902.

Our custom widget that checks for duplicated images suggested this unlikely pairing.  Click each image for its source.

From the University of Arkansas, Fayetteville's 1927 yearbook.

He boxes in church.  From the Duluth Herald, 1920.

From the College of William and Mary's 1920 yearbook.